Planning first engine build, need help

I had it set to TDC then advanced it bout 15 degrees out.

That's about as vague an answer as anyone could ever give. What does that mean? Does that mean you HAVE it at 0 and it advances about 15 or that you had it at 0 and then bumped it to 15? Don't make this anymore difficult than it already is. Remember, YOU know everything. WE are on the other end of the internet.